Question

for which of the following compounds Kjeldahl method can be used to determine the percentage of nitrogen ? a. nitrobenzene b. pyridine c. alanine d. diazomethane

Answer 1

u can use it for alanine because its not given by pyridine as nitogen is in the ring
di azo methane has azo bond

Answer 2

Hey brainly user!

here is your answer

$\boxed{\sf\pink{Kjeldahl's\:method}}$

✔ In this method, the compound

heated with concentrated sulphuric acid in the presence of small amount of ${CuSo_4}$to convert nitrogen into Ammonium Sulphate

✔The contents of the flask are transferred to another flask and heated with excess of sodium hydroxide solution to liberate ammonia gas

✔ Ammonia gas so liberated is passed and absorbed known as the volume concentrated sulphuric acid

✔Organic compound +${H_2SO_4{\rightarrow}(NH_4)_2SO_4}$

${(NH_4)_2SO4+2NaOH{\rightarrow}Na_2SO_4+2H_2O+72NH_3}$

✔${2NH_3+H_2SO_4{\rightarrow}(NH_4)_2SO_4}$

Answer :Alanine